Author Topic: Rocker Engine (Read 29171 times)

foozer · « **on:** July 18, 2009, 01:04:54 AM »

Ok I'll toss this attempt into the mix. The little rocker engine

Two whole pieces complete, weekend project?

The axle and crankdisk, small, tiny, need new glasses

Dont want any tool envy going on now

First shot drilling the holes in the disk with my fancy dancy cross slide
thing-a-ma-bob, it works

Second cutting off the excess to which I dropped the other piece and spent 20 minutes looking for it. Of course it found that little space between to lathe stand legs and floor bolt down bracket. All nice and cozy it was too, just a-sitting there watching me hunt

Third shot facing the disk down to finish size, Yes there is a part down in there

Final first 2 little pieces. Photos don't do it justice. that is a small little engine.

Robert

bogstandard · « **Reply #1 on:** July 18, 2009, 01:12:50 AM »

Robert,

You need to talk to our John Hill. He is only just starting to use a vertical slide, and you might be able to show him a few good pointers.

Nice work by the way.

Bogs

foozer · « **Reply #2 on:** July 18, 2009, 01:16:01 AM »

Quote from: bogstandard on July 18, 2009, 01:12:50 AM

Robert,

You need to talk to our John Hill. He is only just starting to use a vertical slide, and you might be able to show him a few good pointers.

Nice work by the way.

Bogs

I've read his bit on its usage, limited use is right, A version 2 is coming up near future

sbwhart · « **Reply #3 on:** July 18, 2009, 02:09:30 AM »

Nice work Robert a vertical slide certainly makes a lathe a truely versatile machine.

I thought I was the only one who dropped and lost things I guess we're in the same club. Its just one of the penalties you pay for having a liking for making small bits.

I'm trying to finish off my rockers over the weekend but my Boss has other plans so I don't think I'm going to get much shop time.

Have fun

Stew

foozer · « **Reply #4 on:** July 18, 2009, 02:36:43 AM »

Quote from: sbwhart on July 18, 2009, 02:09:30 AM

Nice work Robert a vertical slide certainly makes a lathe a truely versatile machine.

I thought I was the only one who dropped and lost things I guess we're in the same club. Its just one of the penalties you pay for having a liking for making small bits.

I'm trying to finish off my rockers over the weekend but my Boss has other plans so I don't think I'm going to get much shop time.

Have fun

Stew

Slide has been handy. Pieced it up to get some vertical adjustment and use the cross slide for the horizontal. Really need to get version 2 going, gain a better balance of overhang and range of movement. Like John Hill I believe has pointed out, cross slide travel to spindle axis limits the range considerable.

Think next on the Rocker engine will be the Flywheel. Wanted to build this thing to spec, thinking tho, the flywheel is gonna suffer some creative changes

foozer · « **Reply #5 on:** July 18, 2009, 08:30:29 PM »

Flywheel time.

Plan calls for a 1.250 inch dia piece. Hmm dont have a piece that fits the requirement. Do have a piece of bronze bearing that has an OD tad greater, do have some AL that an OD a tad smaller. A two piece adventure.

Made the rim, OD 1.250 inch ID 1.050 inch
Made the web OD 1.055 inch (heat rim, chill web press together?)

Drilled holes in web, took the vise of my handy dandy and mounted a little RT. And yes it is hard to see things at that angle. Changed number and size of web holes to account for smaller dia web. Started at 0 and went +72 from there to get the 5 holes.

Brides cooking a chicken sitting on a beer in the oven, seems like a good time to pop the bronze rim in

Problem coming up with this attack method. Flywheel is going to wobble. Have left some extra on the flywheel to skim it straight but . . Solution best i can ponder is to make a new axle shaft slightly oversize on the bearing end. press it into the flywheel, soft jaws will handle the true up of the assembly.

Robert

sbwhart · « **Reply #6 on:** July 19, 2009, 01:59:32 AM »

Quote from: foozer on July 18, 2009, 08:30:29 PM

Flywheel time.

Solution best i can ponder is to make a new axle shaft slightly oversize on the bearing end. press it into the flywheel, soft jaws will handle the true up of the assembly.

Robert

Hi Robert

Thats how I did my flywheel it'll work out spot on. Like the composite fly wheel idea that's what I also did for my Elbow Engine build had some problem with the shrink fit didn't quite get the shrink quite right and because of the material I used for the hub one of the spokes cracked, resorted to high strength loctite that did the trick.

Have fun

Stew

rleete · « **Reply #7 on:** July 19, 2009, 10:27:17 AM »

Shrink fits are tricky. For something that small, you need damn near line to line. You're probably better off going for a press fit. If you end up a bit too loose, loctite works.

Brass_Machine · « **Reply #8 on:** July 19, 2009, 10:58:22 AM »

Wow thems some small parts!

Anxious to see it complete.

Eric

foozer · « **Reply #9 on:** July 19, 2009, 04:23:52 PM »

I thought all was centered, really I did, OH? you mean subtract half the edge finder dia from the . . .

This time around used the indicator, at least I think I am. Rotate the part and get a max run out in the 1-2 thou range. Could fiddly forever but that's within my comfort range for now.

Drilled the holes, 6 this time, they fit. Set it in the soft jaw and as I hate turning that handle I used the old "Dont you wish you had one" Cross slide power handle turner. 6 minutes later she be all nice and even.

Shot showing the failure on the right, could'a sworn everything was centered. The better flywheel on the left. My lunch underneath

Now to get the crankshaft attached and true

sbwhart · « **Reply #10 on:** July 19, 2009, 05:00:44 PM »

Robert

That fly wheel looks the buisness

nice to see how your using the versatility of the vertical slide

I'm shure some of the guys will learn a lot from this thread

Have

Fun

Stew

foozer · « **Reply #11 on:** July 19, 2009, 06:26:49 PM »

Quote from: sbwhart on July 19, 2009, 05:00:44 PM

Robert

That fly wheel looks the buisness nice to see how your using the versatility of the vertical slide I'm shure some of the guys will learn a lot from this thread

Have

Fun

Stew

Thanks, only other attachment for the crude vertical slide is a plate with a bunch of tapped holes in it to handle what the little vise wont. Its usage is limited but with no mill at least some of the functions can be emulated.

Have a 4 inch angle plate that will be the base of the next generation slide. More robust, attempt to reduce the overhang and increase the range of use around the spindle axes.

Robert

Bernd · « **Reply #12 on:** July 19, 2009, 07:51:52 PM »

Robert,

Turning out some neat work on that little lathe. Nice going.

Bernd

foozer · « **Reply #13 on:** July 19, 2009, 08:47:48 PM »

Quote from: Bernd on July 19, 2009, 07:51:52 PM

Robert,

Turning out some neat work on that little lathe. Nice going.

Bernd

Thanks

The lathe and I are having a discussion today, it says "HAHA, you want plus or minus what?" and I say you'll be anchoring the boat you (Bleeped)

Got this 30 ton log splitter if firmer measures are required

rleete · « **Reply #14 on:** July 19, 2009, 09:05:11 PM »

Keep at it. Those tiny parts are a real pain, but it's a great little runner.

NickG · « **Reply #15 on:** July 20, 2009, 07:29:24 AM »

Nice, I definitely want to make one!

RE: losing small bits, when I was at my dads a few months back looking for something, in a box there were several piston rods from my first ever steam engine ... an oscillator with 1/8" bore and about 3/8" stroke that was featured in Model Engineer. He said he found them down the back of the lathe when we moved it! Some of them were just ones where i'd made mistakes but some were lost .. never to be seen again!

Nick

foozer · « **Reply #16 on:** July 21, 2009, 10:32:33 PM »

While most have completed their 'Rocker' I'm still chugging away, ignoring all other items that need attention. OK I did get the tranny back into the car, still sitting on stands tho

Where am I? OH the piston. Turned it down and figured I'd better get that little hole drilled before I have a piece I cant handle. Another way around the fence. Took a piece of AL same dia as the piston stock, drilled a 0.0125 hole into one end. Measured in 0.517 and marked.

Slipped the piston rod into this and mounted into my little hole drilling jig.

Worked. Hole looks right so now to remove the rest till just the piston/rod remains.

Robert

Slow, yup Fun, YUP

NickG · « **Reply #17 on:** July 22, 2009, 08:38:11 AM »

Good progress there Robert, like some of your work holding methods, you definitely make the most out of your lathe.

Bernd · « **Reply #18 on:** July 22, 2009, 10:28:34 AM »

Robert,

Nice work. That fixtureing was a neat idea.

Bernd

sbwhart · « **Reply #19 on:** July 22, 2009, 11:28:42 AM »

Robert

Real nice work as I've said you've got a real gift with the vertical slide

Stew

foozer · « **Reply #20 on:** July 22, 2009, 12:55:19 PM »

Quote from: sbwhart on July 22, 2009, 11:28:42 AM

Robert

Real nice work as I've said you've got a real gift with the vertical slide

Stew

Stew, Bernd, Nickg Thanks for the kind words

You know what they say, If all you have is a bushel of lemons, make a rocker engine

Robert

foozer · « **Reply #21 on:** July 25, 2009, 12:14:33 AM »

This is my second engine built. So the wobbler now has a buddy. Have no idea what number 3 will be like.

Bitten by the "Cant leave it alone" bug, some minor deviation from the plans occurred.

Figured someone would ask how it works so, well its a show and tell.

Still need to change out the screw for the crank disk. Should be a runner

Bride will be ticked when she figures out where the stand came from, No honey! there were only 5 goblets in the set, really. . .

Robert

sbwhart · « **Reply #22 on:** July 25, 2009, 02:02:27 AM »

Hi Robert

Thats a neat idea having the perspex cylinder so you can see the action, love the ~~goblet~~ stand it adds to the elegance.

Have fun

Stew

bogstandard · « **Reply #23 on:** July 25, 2009, 02:15:06 AM »

Very nice indeed Robert.

It is nice to see people deviating from the drawings, it makes a truly unique engine.

Now how much is it worth for me not to send your better half an email about the missing goblet?

Bogs

foozer · « **Reply #24 on:** July 25, 2009, 03:11:39 AM »

Quote from: bogstandard on July 25, 2009, 02:15:06 AM

Very nice indeed Robert.

It is nice to see people deviating from the drawings, it makes a truly unique engine.

Now how much is it worth for me not to send your better half an email about the missing goblet?

Bogs

Quote

Posted by: sbwhart

Hi Robert

Thats a neat idea having the perspex cylinder so you can see the action, love the goblet stand it adds to the elegance.

Thanks for the compliments,

Making a "Bell" from the goblet remains, has a nice tone to it. Give it to the bride and she'll never know, maybe, hope so, perhaps. Boy am I gonna be in the dog house

CrewCab · « **Reply #25 on:** July 25, 2009, 05:18:37 AM »

Very elegant

and unusual, all round a first class job

CC

Divided he ad · « **Reply #26 on:** July 25, 2009, 08:21:50 AM »

Very nice and different approach, once you have that screw swapped will you have the facility for a video?

Here was me thinking you'd made the stand!

Perhaps that is what you should tell the "bride"?!

It very definitly looks like

has re-appeared!!!

Ralph.

foozer · « **Reply #27 on:** July 25, 2009, 12:13:29 PM »

Quote from: Divided he ad on July 25, 2009, 08:21:50 AM

Very nice and different approach, once you have that screw swapped will you have the facility for a video?

Here was me thinking you'd made the stand! Perhaps that is what you should tell the "bride"?!

Ralph.

Video yes. Still need to improve upon my polish up skills, I dont even wash the car but once a year so polish is well, err, ah . . .

Quote

Posted by: CrewCab

Very elegant and unusual, all round a first class job

Was by accident. Reading some of the post that were trying to explain how the piston rocked and seeing what Bogs was up to that piece of acrylic rod sorta jumped out at me. That stuff is odd to deal with, looks so bad after you cut it, but a bit of polish compound and it turns clear as bright blue sky.

The stand is a bit, not sure if iy overpowers or not. Little motor just looked so sad at ground level, something was needed to get it to stand proud.

Thanks for the kind words.

Robert

rleete · « **Reply #28 on:** July 25, 2009, 12:20:35 PM »

Very nice.

You've attained full membership in the Madmodder Rocker Club.
You now have all the privledges and benefits (i.e. none) of the club.

foozer · « **Reply #29 on:** July 25, 2009, 07:55:24 PM »

DONE! Time for a double shot

Some time spent with the buffing wheel, and of course it spun the flywheel out of my hand, little ding, but adds character, ya! that's my story and I'm sticking to it.

OOH Shinny Things

And a short Video, thing actually runs on breath power, after 20 seconds or so I begin to turn BLUE. Bride cant get it to tick over at all. Cant figure that, she sure had enough air to ream me for the "Goblet"

Robert

foozer · « **Reply #30 on:** July 25, 2009, 11:15:38 PM »

And a close up shot of the piston traveling through one revolution

Barn Birds and all,

Robert

sbwhart · « **Reply #31 on:** July 26, 2009, 12:57:58 AM »

Excellent Robert

That's a real unique engine you've built there, the videos show just how it works, thanks for sharing.

Stew

Stilldrillin · « **Reply #32 on:** July 26, 2009, 04:28:29 AM »

Perfect show, in slow mo.......

David D

Bernd · « **Reply #33 on:** July 26, 2009, 11:36:13 AM »

Robert,

Nice video on the slow motion. Really shows how that engine works.

Thanks for a great show.

Bernd

dsquire · « **Reply #34 on:** July 26, 2009, 12:16:02 PM »

Quote from: foozer on July 25, 2009, 11:15:38 PM

And a close up shot of the piston traveling through one revolution
..........
Barn Birds and all,

Robert

Robert

A fantastic little engine. You should be proud of it

I like the way you showed the slow motion of 1 RPM. That picture does say more than a thousand words.
This was

at work at its best.

Cheers

Don

foozer · « **Reply #35 on:** July 26, 2009, 01:06:28 PM »

Thanks all for the kind words. As it does run on lung power, its time to do a show and beg from the local metal works, see what I can ~~con~~ err acquire, as I wag my tail

Robert

Divided he ad · « **Reply #36 on:** July 26, 2009, 08:36:06 PM »

I've just put pretty much this same comment on the tube video....

How's it done? I'm thinking it has something to do with the blue movement in the background?

I'm figuring it's in real time as I'm sure I can hear the birds chirping normally in the audio?

Very nice take on the engine Robert..... Your polishing skills appear fine... The slipage and sending across the room of small parts is quite common and usually very exciting, until you see the damage in the part!

I do hope you're ok after the reaming

Ralph.

foozer · « **Reply #37 on:** July 26, 2009, 08:56:19 PM »

Quote from: Divided he ad on July 26, 2009, 08:36:06 PM

I've just put pretty much this same comment on the tube video....

How's it done? I'm thinking it has something to do with the blue movement in the background?

I'm figuring it's in real time as I'm sure I can hear the birds chirping normally in the audio?

Little diorama 2 1/2 rpm motor from micro mark. Left a little spud? on the flywheel when I made it so a small dia tube, (dab of super glue) could attach. Slipped it straight back thru the blue to the motor.

Tis barn bird time of the year, they let me use it once in a while.

Robert

DavesWimshurst · « **Reply #38 on:** July 27, 2009, 07:37:45 AM »

Robert,
You should have left the air line on the engine and given the pressure as 0.05 psi!

Dave

Bernd · « **Reply #39 on:** July 27, 2009, 11:40:22 AM »

Quote from: DavesWimshurst on July 27, 2009, 07:37:45 AM

Robert,
You should have left the air line on the engine and given the pressure as 0.05 psi!
Dave

Good catch Dave. I hadn't even seen that the hose wasn't attached.

Must have been half a sleep.

Bernd

Divided he ad · « **Reply #40 on:** July 27, 2009, 01:36:31 PM »

Ahh... All becomes clear.......... Well all about the filming that is

What's a barn bird?

Dave,

Your wicked!

Ralph.

foozer · « **Reply #41 on:** July 27, 2009, 01:47:52 PM »

Quote from: Divided he ad on July 27, 2009, 01:36:31 PM

What's a barn bird?

They got 2 legs, rather plain looking in morning, and make a lot of noise when disturbed

sbwhart · « **Reply #42 on:** July 27, 2009, 03:10:25 PM »

Quote from: Divided he ad on July 27, 2009, 01:36:31 PM

What's a barn bird?

Ralph.

There what we call Swollows

Stew

bogstandard · « **Reply #43 on:** July 27, 2009, 06:43:06 PM »

Quote

They got 2 legs, rather plain looking in morning, and make a lot of noise when disturbed

Sounds like the wife in a bad mood. After you have pulled the covers off her, then asked her to go down and make coffee.

Bogs

NickG · « **Reply #44 on:** July 29, 2009, 01:37:05 PM »

That is brilliant, and thanks for the slow mo vid.

Nick

foozer · « **Reply #45 on:** July 29, 2009, 02:16:33 PM »

Quote from: NickG on July 29, 2009, 01:37:05 PM

That is brilliant, and thanks for the slow mo vid.

Nick

My pleasure, Thanks for the kind words

Robert

John-Som · « **Reply #46 on:** July 30, 2009, 03:11:49 AM »

BREAKING NEWS.........BREAKING NEWS..................BREAKING NEWS

News is coming in of a further outbreak of Rocking Blingbugitis.

According to the government health minister, I Killum, this is one of the worst cases reported so far.

Local people have been disturbed by strange stirrings in deepest Yorkshire where the high pitched sound of a polishing machine is accompanied by an out of tune voice repeatedly singing ‘it don’t mean a thing if it don’t have no bling, dah dah di dah’.

Our reporter has been on the scene and has managed to capture one or two pictures.

Meanwhile over the pennines in Cheshire a large man with a very small dog has been arrested by the authorities for inciting abnormal behaviour amongst previously normal and harmless people. In a willful act he stands accused of deliberately encouraging model engineers to produce strange shiny little engines and thereby spreading the Bling virus for which, at present, there is no known cure.

Yes folks I have got it too.

I have this compelling urge to go and fashion a weird flywheel - must go.

JohnS

sbwhart · « **Reply #47 on:** July 30, 2009, 03:23:16 AM »

Hi JohnS

Yes you've got

That looks very nice it amazing the variations you can get with a little bit of imaginative Bling.

Have fun

Stew

Stilldrillin · « **Reply #48 on:** July 30, 2009, 03:46:58 AM »

This bling thing`s not gonna bite me!

But, I seem to have made some little parts, for some reason..........

Hmmmm.......

David D

bogstandard · « **Reply #49 on:** July 30, 2009, 04:45:52 AM »

Nice one John.

Now it seems that with a little push, people are starting to think for themselves, rather than go Lemming fashion and make direct from plans.

BTW John, a square or triangular flywheel on that would look just right.

Also you shouldn't blame me, it was Stew who started this little monster rolling.

Bogs

Darren · « **Reply #50 on:** July 30, 2009, 05:01:27 AM »

There's some nice looking rockers coming out of this place, well done JohnS, yours is looking very different again, and very nice too...

Keep this up and i might come down with

Getting closer to having some machines running again, and feel a bug coming on.....

foozer · « **Reply #51 on:** July 30, 2009, 05:14:27 AM »

They just keep getting fancier all the time.

I'd best take a double shot before the fever sets in and I start a-singing

"I'm gonna get ya little Rocker" and make a half scale version

Robert

John-Som · « **Reply #52 on:** July 30, 2009, 09:22:34 AM »

Thanks Guys

Have you noticed how our main suspect is now trying to pass the buck on to an innocent sole -it's shameful !

BTW Stew, belated best wishes on your retirement. I have now been retired for 11 years and everyday still feels like a holiday - enjoy yourself.

Bogs, as usual you read me like a book - I am aiming vaguely for an art deco look, sort of Odeon cinema 1920.

JohnS

Brass_Machine · « **Reply #53 on:** July 30, 2009, 09:29:48 AM »

Wow. Missed the last half of this thread. Very cool rocker. Love the acrylic (it is acrylic?).

Rockers are turning out nice!

Eric

foozer · « **Reply #54 on:** July 30, 2009, 01:22:45 PM »

Quote from: JohnS on July 30, 2009, 09:22:34 AM

Thanks Guys

Have you noticed how our main suspect is now trying to pass the buck on to an innocent sole -it's shameful !

Your right, shame on Bogs

Quote

Posted by: Brass_Machine
Wow. Missed the last half of this thread. Very cool rocker. Love the acrylic (it is acrylic?).

That is it. Wasn't planned that way, cutting that stuff was a whole new experience.

Robert

bogstandard · « **Reply #55 on:** July 30, 2009, 04:14:56 PM »

I would just like to make an apology, in case anyone was upset by my statement.

Quote

rather than go Lemming fashion and make direct from plans.

I now know that this could very easily cause offence to people new to the art of making these engines, and really should have been worded better by myself.

Some people enjoy making directly from plans, and stick with the original dimensions and shapes, my statement should have read that it is rather easy to modify the drawings to make a more personalised engine.

John

Darren · « **Reply #56 on:** July 30, 2009, 04:35:33 PM »

That's quite alright John, you can call me a Lemming if it pleases you...

Another slant on the issue, I'm following your Paddleduck plans as precisely as I'm able to teach myself accuracy....

But I may deviate at some point.........

bogstandard · « **Reply #57 on:** July 30, 2009, 04:43:04 PM »

You change whatever you want to Darren, it is your build, and as such, only you know what you are willing to accept with regards to changes.

It is that individuality that makes life so pleasant.

What would the world be like if everyone liked the same music, food, clothes, cars etc. I am sure there would be booming sales of nooses.

John

sbwhart · « **Reply #58 on:** July 30, 2009, 04:52:19 PM »

Quote from: JohnS on July 30, 2009, 09:22:34 AM

BTW Stew, belated best wishes on your retirement. I have now been retired for 11 years and everyday still feels like a holiday - enjoy yourself.

JohnS

Thanks John

Stew

Brass_Machine · « **Reply #59 on:** July 30, 2009, 05:44:37 PM »

Quote from: foozer on July 30, 2009, 01:22:45 PM

Quote
Posted by: Brass_Machine
Wow. Missed the last half of this thread. Very cool rocker. Love the acrylic (it is acrylic?).

That is it. Wasn't planned that way, cutting that stuff was a whole new experience.

Robert

Robert, would you elaborate on that statement? I have an idea that would use some acrylic... having an idea of how to machine it before I do would be great! You can start another thread so as not to muddy this one.

Thanks
Eric

foozer · « **Reply #60 on:** July 30, 2009, 06:20:33 PM »

Quote from: Brass_Machine on July 30, 2009, 05:44:37 PM

Robert, would you elaborate on that statement? I have an idea that would use some acrylic... having an idea of how to machine it before I do would be great! You can start another thread so as not to muddy this one.

Thanks
Eric

The one experience, good thing I had a foot or so of the stuff.

Drilling the bore hole. First crack at it took it like it was metal. Drilled a slight undersized hole to then ream to size. Ah no. Spun it fast and a sharp bit, way over size. Went down on the initial hole size, think it was around 0.300. Hole surface little milky appearance but not to bad off. This time the reamer 0.374 had some meat to remove. Hole surface not bad. Spun it slow and feed the reamer in with the tailstock crank. Hole came out at 0.380. used a wooden plug with polish past to get the surface clear. Easy op, Finish hole size was 0.382. Salvation was i turned the piston to 0.385 so I could fit it to the cylinder, saved me from having to make another.

Flycutter for the flat side of the cylinder. Cranked the lathe up to 3k with light cuts and just spun the crank by hand. Surface perty smooth, a few swipes of 220-400 and some polish paste came out clear as a bell.

Like I said this is the first time I tried cutting that stuff, what i gather is to leave lots of extra material on the outsides and make the bored holes way undersized. Easy stuff to sand to size, real easy for the machine to make scrap out of it.

Buffing wheel will quickly round the edges, so that usage is a light touch affair or real soft wheel. The piston bore will quickly let you know how smooth the piston is. Have to re polish the bore before I make it a shelf queen

Now if any of that makes sense your a better reader than I am a writer. For a see through, its good stuff.

Robert

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Author Topic: Rocker Engine (Read 29171 times)

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